**Goal**: Create 100-line minimal test case to reproduce SSA/ValueId
bugs in Stage-B compilation without the complexity of full compiler_stageb.hako.
**Files added**:
1. **lang/src/compiler/tests/stageb_min_sample.hako** (65 lines)
- Pattern 1: Method call in if-block before loop (TestArgs.process)
- Pattern 2: Simple method calls without loops (TestSimple.run)
- Pattern 3: Nested if/loop with method calls (TestNested.complex)
- All patterns reproduce ValueId SSA bugs
2. **tools/test_stageb_min.sh** (executable test script)
- Test 1: Direct VM execution
- Test 2: Stage-B compilation pipeline
- Test 3: MIR verification
**Test results** (as of commit):
Test 1 (Direct VM):
```
❌ ValueId(14) error in TestArgs.process/1
(different from ValueId(17) in Stage-B!)
```
Test 2 (Stage-B):
```
❌ ValueId(17) error in StageBArgsBox.resolve_src/1
(expected, same as full compiler_stageb.hako)
```
Test 3 (MIR verification):
```
✅ No verification errors
(verifier doesn't catch these specific SSA bugs)
```
**Findings**:
- Multiple ValueId SSA bugs exist (14, 17, etc.)
- MIR verifier needs enhancement to catch receiver use-before-def
- Minimal harness successfully reproduces issues for easier debugging
**Next steps** (not in this commit):
- Fix ValueId(14) in TestArgs.process
- Fix ValueId(17) in StageBArgsBox.resolve_src
- Enhance MIR verifier to catch Method receiver SSA bugs
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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